Hello, I'm a newbee and have been building my 06 S40 for about 2 months. The forum has helped out a lot and I have met some good people through it.
I have searched but as you all know a lot of the old posts no longer have pictures available. I also tried the Search engine, but haven't had much luck with it.   My bike only has 4K miles so i'm on the fence when it comes to how far I want to take the motor? I plan on going with Lancer's Carb Kit, and I'm trying to fine a Mac Header.  So the question is :  How has opened up the Exhaust port on their motor without pulling the motor apart ? What techniques have been used to do it with the motor together ? I did see something about paper towels and shaving cream. I wasn't able to find much else, or pictures. I would like to do it but don't want to get something into the motor that will cause damage later. If you have experience with this procedure please let me know.  Thank you for your time and sorry this is so long. Dan P

Thanks Dave I will check that one out.

Well from what I've read on the forum it does help. I also plan on replacing the stock header and muffler with something more free flowing.